Computing scale



Feb. 20, 1940. ARAUJO 2,190,640

. COMPUTING SCALE Filed June 2, 1938 4 Sheets-Sheet 2 lNVENTOR Armanda A faq '0 aymydww ATTORNEYS Feb. 20, 1940. ARAUJO 2,190,640

COMPUTING SCALE Filed June 2, 1938 4 Sheets-Sheet 3 lNVENTOR l ArtmmabAraz 'o ATTO RN EYS Feb. 20, 1940. A RAU G 2,190,640

COMPUTING SCALE Fiied June 2, 1938 4 Sheets-Sheet 4 AN ARy 9 w u u I5|6 :110.19 20 E INVENTOR ArmanarbArazyo J w VIII/4434 ATTORN EY Patented Feb. 20, 1940 UNITED STATES EPATENT OFFICE 5 Claims.

This invention reiates to a circular scaie for calcuiating the menstruai cycle and the periods of fertility and infertiiity of women.

Experiments and observations in the field of gynecology have established the existence of a eriod of fez'tility, during; which ovulation takes place time between successive occurrences of the menses. The menstrual cycie is divided into two periods of sterility with a period of fertiiity therebetween.

The menstrual cycle and the time when ovulation occurs in relation to the menses varies for different women and varies somewhat from month to month in the same woman. These variable factors and the fact that spermatozoa remain viabie for about two days after being deposited require that about four or five days he considered the fertile period, despite the fact that ovuiation requires only a .fraction of this time to actually occnr. The mid-point of the ferttile period is usualiy thirteen or fourteen days after the beginning of menstruation. The period of fertiiity is usuaily considered as being within a space of time two or three days on each side of this mia-point, that is, extending from the twelfth to the sixteenth day. If the period of menstruation varies and is apt to be slightly irreguiar, the .fertile time may be considered from eleventh to the seventeenth day after the menses start.

An object of the present invention is to produce a calcuiating scale which will indicate the time that the next period of menstruation may be expected to commence and the intervening period of fertiiity, both in relation to the time of commencement of the earlier menses.

Another Object is to toroduce such a scale which is simple in Construction and requires only one that is. a setting* on the date of the oo imencement of present menses in order to indicate the date of the next menstruation the intervening period of fertiiity.

Still another Object is to produce such. a sim-` Fig. 3 is a section through 3-45 of Fig. 2;

Fig. 4: is a plan view of the stationary disc of the scaie Showing the various rows of numbers thereon for a non-leap year;

Fig. 5 is a plan view of the stationary disc of the scale Showing the various rows of numbers thereon for a leap year; and

Fig. 6 is a plan view of the stationary discof the scale Showing the various rows of numbers thereon for either a leap year or a non-leap year.

The Computing scale herein described may be used in combination with a box or container for sanitary napkins or the like, or it may be used separately. It is shown in some of the figures as combined with such a box, but it is to be understood that this invention is not limited to such a combination.

In the drawings the box or container, which may be of any suitable size or shape, is shown at B. On the top thereof, the scale is shown at S forming the letter "O of the word 'DOE" which may he a trade-mark, the name of the manufacturer or any other conspicuous word on the box. The Computing scale is made up of a stationary underneath portion in the form of a circle or disc, as shown at L When the device is incorporated. as part of a box, this lower or stationary scale may be printed thereon. Vvhen it is not part of abox, it consists of a circular disc, such'as that shown in Fig. 4. An upper moi/able disc 2 is attached to the lower disc by means of a rivet 3 passing through the centers of both discs and. so arranged that the upper disc may'rotate freely.

Looking at Fig. 4, which discioses the lower disc for a non-leap year with the upper disc removed so that the various rows of figures may he seen. it will be observed that the disc is divided into five quadrants. The ouadrant near the top of the disc for the month of January, the one immediately to the right is for the month of February and proceeding in a clockwise disection, the next quadrant is for the months of March. August and October. all thirty-one day months, and following this is the quadrant representing the months oi April, June, September and November, all thirty day months. Fi-

' nally, between the last nientioned quadrant and the first quadrant is arranged quadrant for the months of December and July.

It will be seen that there are seven ooncentric rows of figures arranged in oircles from a point near the periphery of the disc inwardly toward the center thereof. The outer row of figures,

shown at 4, represents the dates for a whole year, that is, for a standard or non-leap year. When the movable disc 2 is attaohed to the lower disc l, this outer row of figures is the only row which is completely visible because the diameter of the movable disc is smaller than the diameter of this outer row of figures. The row of figures immediately adjacent to the outside row nearest to the periphery and shown at 6 indicates the dates separated from the corresponding dates on the first mentioned row of twenty-six days. The third row of figures, shown at T, indicates corresponding dates separated from the first row by twenty-eight days. The fourth row, shown at 8, indicates corresponding dates separated by thirty days and the fifth row, shown at 9, indicates corresponding dates separated from the first' row by thirty-two days. It will be noticed that these figures are all arranged so that they are intended to be read near the top of the scale or chart and, when so read in that position, are right side up. These various rows of figures are intended to indicate the date of the next expected menstruation and each row is for a dififerent length of cycle. Row 5, which is the second row of figures from the periphery, is for a cycle of twentysix days, row 'I oftwenty-eight days, row of thirty days and row 9 of thirty-two days.

The two innermost rows of figures, which are shown at l l and I 2, respectively, are arranged to be read when near the lower edge of the card, that is, below the center thereof. These figures are intended to indicate the dates between which the woman is fertile, but ,it shall be understood that this period of so-called fertility may be lengthened in either' direction, depending on many personal factors and the period of four days shown on the chart is to be considered merely as a guide for a, normally functioning woman.

Looking at the scales shown in Figs. 1 to 4, the upper disc 2 isso arranged that when in position it covers all the various concentric rows except the outermost one, shown at 4. This movable disc has thereon a pointer I2 on or near the periphery thereof, which pointermay be used to designate any date on the outer row of figures. Aligned with this pointer in radial relation are suitable openings in this disc which are adapted to disclose only the figures of the various rows discussed above which correspond to the upper date designated by the indicator 42. Opening l3 will uncover a figure in row 6, opening I 4 will uncover a figure in row' 1, Opening IS will uncover a figure in row 8 and Opening IS will uncover a figure in row 9.* Openings Il and I8, shown below the center of the disc in Fig. 2, are designed to disclose corresponding figures in rows I I and l2.

' The stationary disc illustrated in Fig. is similar to the one shown in Fig. 4 except that the dates are arranged for a leap year, and instead of Showing four rows of figures for four different lengths of cycles of menstruation, only three are shown. The outer row 'of figures designating the days of the year are shown at 20. The three rows designating the expected date for the next menses are shown at 21, 22 and 23 and are arranged for cycles of 25,26 and 32 days, respectiVely. The two innermost rows of figures, shown at 24 and 25, designate the intervening period of fertility.

Fig. 6 illustrates a stationary disc similar to that shown in Figs. 4 and 5 except that the numbers are arranged so that it may be used on either a leap year or a non-leap year. As in Fig. 5, the outermost row, shown at 39, designates the .days of the year. The next three rows, working inwardly, designate the dates of next expected periods of menstruation and are numbered respectively 3I, 32 and 33 for 25, 26 and 32 day cycles, respectively. The two innermost rows, shown at 34 and 35, designate the intervening period of fertility. It will be noticed that certain spaces for dates contain two figures, one figure for a leap year and one for a non-leap year.

In operation, it is only necessary to rotate the movable discuntil the pointer |2 is lined up with the date of the first day when the menses commence and the figures viewed through the openings l3, I4, l5 and` I 6 will designate the dates of the commencement of the next menstruation, depending on the length of the cycle, The figures which can be seen through the Opening l'l and [8 will designate the period of fertility intervening between the two periods of menstruation. This period of fertility may be adjusted by the user to compensate for any irregularity in the menstrual cycle. If this cycle is longer than the normal cycle of twenty-eight days, two or three days may be added to the end of this fertile period. If it is shorter than the normal cycle, one or two days may be added to the beginning of this period.

It will be seen that this scale serves two purposes, which may he utilized together or separately., First, it serves' to designate the date of the next period of menstruation and secondly, it serves to indicate the intervening period of fertility. If it is desired to construct a scale for only one or the other of these purposes, it is only necessary to omit the figures on the diso 'and the openings on the movable disc 2, corresponding to the function which it is desired to omit. If the chart were to be used only to designate the next periodof menstruation, the openings IT and IB on the movable disc would be omitted and the rows of figures shown' at H and 12 on the stationary disc would be omitted. If it were desired to use the scale only for designating the period of fertility, the rows of figures shown at 6, 1, 8 and 9 on the stationary disc Would be omitted and the corresponding openings l3, |4

I5 and Hi of the movable disc also omitted.

I claim:

1. In a device of the character described, a sta- 'movable disc adapted to cover all but the outermost row of figures, a pointer on said movable disc adapted to be aligned with any figurein said outermost row, and aligned openings adapted to reveal only the figures in the other rows which correspond to the date in the outer row to which said pointer is set so that the date of the next menstruation is shown.

2. In a device of the character described, a stationary disc having a row of figures around the periphery thereof indicating the days in the year, a plurality of rows of figures inside saidfirst mentioned row indicating the date of the next 'expected menstruation, each row corresponding ed to be algned With any figure in said outermost row, aligned openings adapted to reveal only the figures in the other rows' Which correspond to the date in the outer row to Which said pointer is set so that the date of the next menstruation is shown, rows of figures inside of said above mentioned rows for indcating the period of fertility between the menstrual periods, and an algned Opening in said movable disc to reveal the dates of said fertile period corresponding to the date at Which said indicator is set on the first row of figures.

3. In a device of the character descrbed, a stationary disc having thereon around the periphery thereof a row of figures representing each day in a leap year, a plurality of Concentrcally arranged roWs adjacent to said last mentioned row, each of said roWs representing dates spaced from the dates of the year by the length of different menstruatcn cycles, double figures in certain Spaces in the last mentioned rows to indcate dates for leap year and non-leap year, and a movable disc on said stationary disc having openings therethrough radially aligned with a pointer on said disc.

4. In a device of the character described, a crcular scale comprising a movable and a stationary disc, said stationary disc having Concentrically disposed roWs of dates arranged near the periphery thereof into five quadrants representing respectively the month of January, the month of February, the thirty day months, the months of December and July and the remaining thlrtyone day months, an outermost row representing the days of the year, a pluralty of I'OWS' adjacent to said outermost row, each row representng the v dates spaced from corresponding dates on the first mentioned row by the number of days in a short, normal or long human menstrual period, and aligned apertures on said movable disc for uncovering only corresponding figures in each row of the stationary disc.

5. In a device of the character des'crbed, a crcular scale comprisng a movable and a stationary disc, said stationary disc having Concentrically disposed roWs of dates arranged near the periphery thereof into five quadrants representng respectively the month of January, the month of February, the thirty day months, the months of December and July and the remaining thirty-one day months, an outermost row representing the days' of the year, a plurality of 1`OWS adjacent to said outermost row, each row representing the dates spaced from corresponding dates on the first mentioned row by the number of days in a short, normal or long human menstrual period, a pair of rows adjacent to and inside the last mentioned rows, the figures of Which represent the dates' of fertility correspondlng to the correspondng menstruation dates on the outermost roWs, and aligned apertures on said movable disc for uncoverlng only corresponding figures in each row of the stationary disc.

ARMANDO ARAUJO. 

